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Suntour APII 7-speed hub

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Old 12-10-17, 06:58 AM
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CrossRoads
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Suntour APII 7-speed hub

I have one of these old Suntour APII 7 speed sprockets on a 1992 Specialized Iím restoring. After the smallest locking cog is removed the remaining cogs are held together by 3 tiny pins. I have only 2! Being a perfectionist bike restorer I wonder, does anyone have one of these pins they donít need? I know I could make my own and have done so but still not happy!
Its a 12-30t and Iíd also like to play with the ratios. If anyone has a Suntour APII 28t cog or indeed any unwanted parts Iíd be interested.
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Old 12-10-17, 11:57 AM
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None of the pins are required, they are just an assembly aid. It is likely that the factory only installed two to save money.

Suntour cassettes occasionally appear on eBay with very high asking prices.
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Old 12-10-17, 12:00 PM
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If you really want one you could make one with the right diameter rod, old spoke maybe?
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Old 12-10-17, 12:12 PM
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Originally Posted by dedhed View Post
If you really want one you could make one with the right diameter rod, old spoke maybe?
that would be one large spoke... and the pins need to be softer, malleable material.... spokes aren't very malleable.
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Old 12-10-17, 12:13 PM
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Quote:
Originally Posted by CrossRoads
I have one of these Suntour APII 7 speed sprockets. After the smallest locking cog is removed the remaining cogs are held together by 3 tiny pins. I have only 2! Being a perfectionist bike restorer I wonder, does anyone have one of these pins they don’t need? I know I could make my own and have done so but still not happy!

contrary to what some folks believe, those tiny, rather soft, pins only aid the assembly of the cassette onto the freehub......

if you torque the lockring properly, and the cassette is correctly spaced to fit the freehub, there will be no issue... and SOME cassettes came with only two of the possible three pins....

if not properly installed, the load is carried by one cog's splines... loading is spread across all the cogs' splines when tightened enough.... it's a friction thing, the pins are irrelevant.
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Old 12-10-17, 12:37 PM
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Originally Posted by maddog34 View Post
contrary to what some folks believe, those tiny, rather soft, pins only aid the assembly of the cassette onto the freehub......

if you torque the lockring properly, and the cassette is correctly spaced to fit the freehub, there will be no issue... and SOME cassettes came with only two of the possible three pins....

if not properly installed, the load is carried by one cog's splines... loading is spread across all the cogs' splines when tightened enough.... it's a friction thing, the pins are irrelevant.
+1 Years ago, many higher quality Shimano cassettes were held together by 3 threaded pins. I bought a SRAM cassette to replace my previous Shimano cassette. I discovered that my new cassette only had one pin holding it together. The pin was only there to facilitate installation. Missing one of three threaded pins will not change the function of the cassette. I would worry far more about finding replacements for worn cogs than about that missing pin. A missing pin will not affect your cassette in any way. A worn cassette cog could make the bike unpleasant to ride
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Old 12-10-17, 12:39 PM
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LBS have 30 year old parts in the basement to cannibalize?
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Old 12-10-17, 05:23 PM
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I've got a pretty good pile of those Suntour cassettes. IIRC might have one missing the threaded cog that could be sold a little cheaper if you're interested.
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Old 12-10-17, 06:56 PM
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Originally Posted by wesmamyke View Post
IIRC might have one missing the threaded cog that could be sold a little cheaper if you're interested.
Yes. Sorry, who is IIRC?
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Old 12-10-17, 07:06 PM
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Another Q: all the spacers are same thickness apart from one very slightly thicker with white lettering printed one it, saying it should go in 2nd position. the small locking 12t cog’s spacer is part of the machines cog so should the lettered spacer go between 14t & 16t?
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Old 12-10-17, 07:08 PM
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Originally Posted by CrossRoads View Post
Yes. Sorry, who is IIRC?
not who, but WHAT... IIRC: If I Recall Correctly. text-speak....
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Old 12-10-17, 07:17 PM
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Originally Posted by maddog34 View Post
not who, but WHAT... IIRC: If I Recall Correctly. text-speak....
Newcomers to any forum may not know what these mean. how much extra time does it take to actually type out the actual text?
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Old 12-11-17, 02:46 PM
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Originally Posted by alcjphil View Post
newcomers to any forum may not know what these mean. How much extra time does it take to actually type out the actual text?
ikr? Smh.
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Old 12-13-17, 08:03 AM
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Anyway, thanks. Although unnecessary, I did replace the missing pin with one I made. The restoration is now complete and the 1992 CrossRoads Sport rides like a new bike, Suntour gear changing smoothly.
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Old 12-13-17, 08:08 AM
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Originally Posted by wesmamyke View Post
I've got a pretty good pile of those Suntour cassettes. IIRC might have one missing the threaded cog that could be sold a little cheaper if you're interested.
Canít send you a private message as I have less than 10 posts but I wonder if you have a good 28t cog for the Suntour APII 7 speed?
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Old 12-13-17, 08:49 AM
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Finished
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Old 12-15-17, 06:02 PM
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Originally Posted by alcjphil View Post
Newcomers to any forum may not know what these mean. how much extra time does it take to actually type out the actual text?
It's not this forum... it's Teh Internetz!
Check out those acronyms here: https://www.netlingo.com/acronyms.php
It's not about saving time, it's about being HIP!
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Old 12-15-17, 06:43 PM
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Originally Posted by CrossRoads View Post
Finished
nice work!

when and IF you run across another cassette of that type, you'd best snap it up as a spare...
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Old 12-16-17, 06:45 AM
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Originally Posted by maddog34 View Post
nice work!

when and IF you run across another cassette of that type, you'd best snap it up as a spare...
If there ever was a worthy cause for someone to re-manufacture a small production run of SunTour cassettes, here it is! The newer ones could be made to match the spline pattern of the freehub body, the odd spacers could be preserved and variants for the threaded outer cogs (standard or micro drive double threaded outer cog for 11 tooth) could be preserved.
I keep hoping that 3D printing will advance to the point where these oddball type items can be re-created. If someone were to make some, they could put the cogs on a diet so to speak and use some creativity to lighten the cassette. I weighed my 8 speed 12-26 cassette after degreasing it recently and it was like 330 grams! Modern Ultegra 11 speed cassettes are much lighter.
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Old 12-16-17, 03:35 PM
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Originally Posted by masi61 View Post
If there ever was a worthy cause for someone to re-manufacture a small production run of SunTour cassettes, here it is! The newer ones could be made to match the spline pattern of the freehub body, the odd spacers could be preserved and variants for the threaded outer cogs (standard or micro drive double threaded outer cog for 11 tooth) could be preserved.
I keep hoping that 3D printing will advance to the point where these oddball type items can be re-created. If someone were to make some, they could put the cogs on a diet so to speak and use some creativity to lighten the cassette. I weighed my 8 speed 12-26 cassette after degreasing it recently and it was like 330 grams! Modern Ultegra 11 speed cassettes are much lighter.
If you're handy with a Dremel and have a little time to kill, it's impressive how much you can take out of old-style cassette cogs using the newer ones as inspiration:



These aren't very pretty, especially the 15T at top right, but compare the untouched 23T second from left on the top row with the opened-up one that's second from left on the bottom row. The Shimano 13-26 cassette weighs a little over 300g out of the package, but mine is 248g or so.
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